The Technology Study of Direct Torque Control Method for Permanent Magnet Synchronous Motor

According to the analysis of mathematical model for permanent magnet synchronous motor (PMSM), direct torque control(DTC) technology is introduced to the control system of PMSM. The paper builds dual-closed loop control system of PMSM, and the outer loop is speed loop, the inner loop is flux and torque loop, at the same time, the paper makes simulation in Matlab/Simulink. The simulation results show that the DTC technology significantly improves the dynamic performances of PMSM, and the control system is no overshoot, and has small flux response comparing with the conventional control methods of PMSM. So the application of DTC technology in PMSM provides a new thoughtful way for PMSM control system designing and debugging in actual application.

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Simulation of Permanent Magnet Synchronous Motor Field Oriented Vector Control System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.672-674.1234 ◽

2014 ◽

Vol 672-674 ◽

pp. 1234-1237

Author(s):

Wen Zhuo Chen ◽

Xiao Yu Zhang ◽

Xiao Mei Sui

Keyword(s):

Control System ◽

Vector Control ◽

Permanent Magnet ◽

Control Method ◽

Permanent Magnet Synchronous Motor ◽

Direct Torque Control ◽

Synchronous Motor ◽

Torque Control ◽

Machine Model ◽

Field Oriented Vector Control

This template illustrates the control system of permanent magnet synchronous motor(PMSM) which uses field oriented vector control(field oriented vector control). PMSM is a complex, strong coupling and nonlinear system. And field oriented vector control could provide good performance as well as the PI controller setted with well parameter matching. Whereas limited by the number of voltage vector, the other control method of PMSM, direct torque control, could not satisfy accurate control when the machine running with a low speed. So modulation of the whole system is built here to realize closed-loop field oriented vector control control by keeping id=0 , and the machine model and the transformation among different coordinate system are discussed. The system is verified effective and feasible.

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The Technology Study of Vector Control System for Permanent Magnet Synchronous Motor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.341-342.1018 ◽

2013 ◽

Vol 341-342 ◽

pp. 1018-1022

Author(s):

Hong Bo Huang ◽

Yong Zhi Wang

Keyword(s):

Control System ◽

Permanent Magnet ◽

Dynamic Performance ◽

Permanent Magnet Synchronous Motor ◽

Simulation Models ◽

Synchronous Motor ◽

Current Loop ◽

Technology Study ◽

Loop Control ◽

Actual Application

According to the analysis of mathematical model for permanent magnet synchronous motor (PMSM) in the d-q coordinate system, space vector width modulation (SVPWM) technology is introduced to the design of PMSM control system. The paper builds dual-closed loop control system of SVPWM for PMSM, and the outer loop is speed loop, the inner loop is current loop, at the same time, the paper builds the simulation models and makes simulation in Matlab/Simulink. The simulation results show that the SVPWM technology applied to the control system of PMSM is very successful, and the dynamic performance of control system is very good. So the application of SVPWM technology in PMSM provides a new thoughtful way for PMSM control system designing and debugging in actual application.

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The Implementation of Permanent Magnet Synchronous Motor Direct Torque Control

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.712-715.2757 ◽

2013 ◽

Vol 712-715 ◽

pp. 2757-2760

Author(s):

Jun Li Zhang ◽

Yu Ren Li ◽

Long Fei Fu ◽

Fan Gao

Keyword(s):

Coordinate System ◽

Permanent Magnet ◽

Control Method ◽

Block Diagram ◽

Permanent Magnet Synchronous Motor ◽

Direct Torque Control ◽

Torque Ripple ◽

Synchronous Motor ◽

Torque Control ◽

Two Phase

In order to deeply understand the characteristics of the permanent magnet synchronous motor direct torque control method, its mathematical models were established in the two-phase stationary coordinate system, the two-phase synchronous rotating coordinate system, and x-y stator synchronous rotating coordinate system. The implementation process of direct torque control method in varied stator winding connection was analyzed in detail. In order to improve the speed and torque performance of the permanent magnet synchronous motor, the direct torque control block diagram and the space voltage vector selection table were given. Finally, the summary and outlook of reducing torque ripple in the permanent magnet synchronous motor direct torque control methods.

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Study on speed sensorless system of permanent magnet synchronous motor based on improved direct torque control

Transactions of the Institute of Measurement and Control ◽

10.1177/01423312211062971 ◽

2021 ◽

pp. 014233122110629

Author(s):

Xiaoxin Hou ◽

Mingqian Wang ◽

Guodong You ◽

Jinming Pan ◽

Xiating Xu ◽

...

Keyword(s):

Control System ◽

Permanent Magnet ◽

Permanent Magnet Synchronous Motor ◽

Direct Torque Control ◽

Torque Ripple ◽

Synchronous Motor ◽

Torque Control ◽

Switching Frequency ◽

Speed Sensorless ◽

Stator Resistance

The traditional direct torque control system of permanent magnet synchronous motor has many problems, such as large torque ripple and variable switching frequency. In order to improve the dynamic and static performance of the control system, a new torque control idea and speed sensorless control scheme are proposed in this paper. First, by deriving the equation of torque change rate, an improved torque controller is designed to replace the torque hysteresis controller of the traditional direct torque control. The improved direct torque control strategy can significantly reduce the torque ripple and keep the switching frequency constant. Then, based on the improved direct torque control and considering the sensitivity of the stator resistance to temperature change, a speed estimator based on the model reference adaptive method is designed. This method realizes the stator resistance on-line identification and further improves the control precision of the system. The performance of the traditional direct torque control and the improved direct torque control are compared by simulation and experiment under different operating conditions. The simulation and experimental results are presented to support the validity and effectiveness of the proposed method.

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